Apparatus for producing bisulfite liquor.



No. ssgsas. Patented Aug. 27, [90L 6. A. STEBBINS.

APPARATUS FOR PRODUCING BISULFITE LlHUOR (Application filed Sept. 5, 1900.)

(No Model.) 2 Sheets-Sheet l.

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No. senses. Patented Aug. 27, IBM.

- a. A. STEBBINS.

APPARATUS FOR PRODUCING BISULFITE LIQUOR.

(Application filed Sept. 5, 1900.)

2 Sheets-Sheet 2.

(No Model.)

WITNESSES:

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GEORGE A. STEBBINS, OF WATERTOWN, NEW YORK.

SPECIFICATION forming part of Letters Patent N 0. 681,586, dated August 27, 1901. Application filed $eptember 5, 1900- $erial No. 29,058. (No model.)

To all whom it may concern:

Be it known that I, GEORGE A. STEBBINS, a citizen of the United States, and a resident of WVatertown, in the county of Jelferson and State of New York, have invented a new and Improved Apparatus for Producing Bisulfite Liquor, of which the following is a full, clear, and exact description.

The purpose of this invention is to provide means for producing bisulfite liquor used in paper manufacture by which the product will be obtained more economically and effect ively than heretofore. This end I accomplish by insuring the intimate contact of the sulfurous gases with the basic solution and also by a system of gradual cooling for the sulfurous gases, all of which will be fully described hereinafter.

This specification is the disclosure of one form of the invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a View showing the apparatus involved in my invention, such View being partly in vertical section. Fig. 2 is a plan view of the apparatus. Fig. 3 is a section on the line 3 3 of Fig. 1, and Fig. 4 is a section on the line 4 4 of Fig. 1.

5 represents the sulfur-burners, which are here shown to be three in number, and each of which has at its top a pan 6, used for heating the water which is employed in the cooling system.

7 represents a number of return bends which are provided, respectively, for the sulfur-burners 5 and serve to carry off the gaseous products thereof. These bends 7 are all in communication with a pipe 8, which passes to manifold pipes 9, placed in a tank 10, and through which manifolds the gases are conducted. From the manifolds 9 the gases pass by a pipe 11 to the lower absorptiontank 12, which is hermetically sealed. Mounted over the absorption-tank 12 is an upper absorption-tank 14, which tanks 12 and 14 are the only absorption-tanks involved in the apparatus. From the tank 12 the gases pass to the tank 14 by way of a pipe 15, and a vacuum-pump 16 through the medium of a pipe 17 serves to draw off the waste gases from the absorption-tank 14. It will thus be seen thata continuous circulation of the gases is induced through the entire apparatus from the sulfur-burners 5 to the exhaust of the waste gases at the pump 16.

The absorption-tanks 12 and 14 are hermetically sealed, and each tank is provided with a number (preferably two) of partitions 17. These partitions, as best shown in Fig. 4, are formed with orifices 17 therein, which permit the gases to pass from one side of the partition to the other; but these orifices are out of alinement, so that the gases are forced to take a circuitous passage through the absorption-tanks, and are thus held in association with the basic solution in the absorptiontanks longer than they would be were the gases permitted to pass directly through the absorption-tanks. For the purpose of agitating the solution within the absorption-tank and breaking up the globules of sulfurous gases I provide each tank with an agitator, comprising a suitably-driven rotating shaft 18, standing vertically in the tank and provided with blades 19, which are located between respective partitions 17 and by means of which the contents of the absorption-tanks are violently agitated and the thorough admixture of the gas with the solution is insured. The gases pass first to the lower absorption-tank 12, and the gases not absorbed there pass to the upper absorption-tank. In the practical operation of the system when the solution in the lower absorption-tank has been properly impregnated with the gases this solution is drawn off by any suitable means, (notshown,) andthe solution fromthe tank 14 is then transferred by way of the pipe 20 to the lower absorption tank 12, where it is again subjected to the action of the fresh gases coming from the burners 5, the upper tank 14 being meanwhile filled with a fresh supply of the solution. The gases drawn by way of the pipe 17 from the upper tank 14 are waste gases, forming the residurapidly that condensation or other effects in-' cident to rapid cooling will take place. In doing this I provide a system of gradually cooling the gases by the use of water. In

the upper absorption-tank lat is placed a coil' of pipe 21, ='communicating with a water-sup ply pipe 22. This coil 21 discharges into a plpe 23, .passing downward to a similar coil 24 in the'bottom of the lower absorption-tank 12.

its several-branches 26 into the heating-tanks 6 of the sulfur burners 5. The water is heated in these'tanks and overflows therefrom into a pipe 27, which leads to a suitablydriven centrifugal or other pump 28 and by which the heated water is forced through a.

pipe 29 and its various branches 29 up to the top "of the bends =7'and'sprayed thereover. I Now it will be observed that the cold water enters the upper absorption-tank 14 and cools the same, it passing therefrom into the flower absorption-tank, the water having gained a slight increase in temperature, and from the lower absorption-tankthe water .passes to the tank 10,, where it is furtherincreased in temperature,.and then it passes to the heating-pan 6,where itisheated'andthen spread over the bends 7. This provides for thegradual cooling of the sulfurous gases generated in the burners 5, and by this gradual 'coolingI bring the gasesat a low tempera'ture-tothe tanks, the solution of which is also'at a =low temperature, and thus I efiecta maximum degree of'absorption without-incurring'thecondensation of the sulfurousgases and other detrimental effects incident to :rapidly lowering the temperature thereof and lalso avoid thedan ger of choking up-thepipes-of the apparatus. The water in the pan 6 is heated 'toatemperature slightly lower than that of the sulfu-rous gases, and:

then'as the ;gases pass into the manifolds 9 they are subjected 'to the action of the water in the tank 10, which water while warm is nevertheless cooler than the gases in the manifolds. Thesame isso throughout the entireoperatiomat each stage of which the gases are subjected to the action of water, which is usedat-a temperature slightlylower than thatof the gases, and thus the gases, as well as the solution in-the absorption-tanks, are eifectually'cooled without involving the" detrimental'effects above mentioned.

Having thus described my invention, I

From this coil 24: the water passes by a pi-pe 25 "into the tank 10, and overflowing therefrom the water passes by a pipe 26 and claim as new and desire to secureby Letters Patent 1. An apparatus for producing bisulfite liquor, having a sulfurous generator with a pan formed thereon, an absorption-tank, a gaspipe passing from the generator to the absorption-tank, means for conducting a cooling liquid into contact with the absorption-tank and then into the tank on the sulfur-burner, and a second means for conducting the water from the pan on the burner to the gas-pipe.

2. An apparatus for producing bisulfite liquor, having a sulfur-burner, with a pan thereon, a gas-pipe passing from the sulfur-burner, and means for conducting the water from the pan to the exterior of the gas-pipe.

3. An apparatus'formakingbisulfiteliquor, having a sulfur-burnena gas-pipe leading therefrom, an absorption-tank to which the gas pipe extends, meansforenforcing'thecir culation of the'gas'through the-gas-pipe and absorption-tank and means for conducting a cooling medium, said means extending con tinuouslyfrom'the.absorption-tank to various points :along the length of the gas-pipe and serving to permit the passage of the cooling medium from the absorption-tank along the gas-pipe to the end thereof adjacent to the sulfur-burner, whereby'to gradually cool the gas as it passes fromthe sulfur-burner to the absorption-tank.

4. An apparatus for producing-bis'uliite liq uor, comprising a sulfur-burner,-=a gas-pipe passing therefrom, an absorption t an' k to whichthe'gas-pipeleads,meansfor en-forcing the circulation of the gas through the pipe and absorption tank, a-cooling-tankthrough which a .part of the gas-pipe passes, and means for carrying a cooling medium, such means extending through and from'the absorption-tank 'to 'the cooling-tank, to conduct the cooling medium from the absorption-tank to the cooling-tank, whereby gradually to cool the gas and the solution in the absorption tank.

5. An apparatus for producing bisulfite-liquor,'comprising a gas-burner with a waterpan arranged to be heated thereby,a gas-pipe passing from the burner, a part of the pipe being located over the pan, an absorptiontank to which the gas-pipe leads, means for enforcing the circulation of the gas in the pipe andjtank, a pipepassing-into thea'bsorption-ta'nk and out-of the same to conduct water from'the absorption-tank'to the water-pan on'the burner, and means for forcing the'water in the pan upward into contact with the part of the gas-pipe which lies over the pan.

6. An apparatus for-producing bisulfite'liquor, comprising a sulfur-burner with a waterpan thereon, a gas -=pipe passing from the burner, a part of the pipe lying over'the pan, an absorption-tank to which the 'gas pipe passes, means for creating a circulation of gas in the pipe and absorption-tank, a cooling-tank into which part of the gas-pipe pro- In testimony whereof I have signed my jects a pipe for conducting water the pipe name to this specification in the presence of 16 passing through the absorption-tank t0 the two subscribing witnesses.

cooling-tank a second pipe passin from the 1 7 r 1 5 cooling-tank to the pan on the barner, and GEORGE STLBBINb' means for forcing the water from the pan up- W'itnesses: Ward into contact With the part of the gas- AUGUST F. RICHTER, pipe which lies over the pan. MAY M. BRENNAN, 

